I currently am running a leveling kit (technically) because it's just pucks and no springs. Pros are that it's cheap and gets you your height you need and quick to install. I did mine myself. Cons is that it doesn't flex as much, so if you're looking for good flexing for hardcore trails, try an actual lift.

 

I have had the TF leveling kit for about 6 months:

Pros: Looks so much better (opinion's vary)!
Ride quality doesn't seem to have changed at all

Cons: Gas mileage does suffer a bit when the rake goes away (in my case, 1-2 mpg BUT also switched to GY Duratracs at the same time so probably a combination of both)

 

Pro: 3/4 inch Daystar kit makes it level(2015 sahara unl)

Con: none yet

 

I ran the Tera Leveling springs in my JK 2 door Rubicon for a couple years and really liked it. With the factory Rubicon shocks, it actually felt very tuned. Had to work decently hard to hit the bump stops when hitting the whoops. I also ran the Jeep all over Moab and lead a day of the JKX when it came to the northwest. It was a surprisingly capable setup which drove great on road.

We also had a Sport with the Tera leveling kit and achieved the same look, although the Sport shocks seemed to be much softer and allowed the Jeep to hit the bump stops quicker off-road.